<Canvas
    xmlns="http://schemas.microsoft.com/client/2007"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
  <!-- emphasize Ellipse -->
  <Ellipse Height="200" Width="200" Canvas.Left="30" Canvas.Top="30"
      Stroke="Black" StrokeThickness="10" Fill="SlateBlue"/>
  <!-- emphasize Rectangle -->
  <Rectangle Height="100" Width="100" Canvas.Left="5" Canvas.Top="5"
      Stroke="Black" StrokeThickness="10" Fill="SlateBlue"/>
  <!-- emphasize Line -->
  <Line X1="280" Y1="10" X2="10" Y2="280"
      Stroke="black" StrokeThickness="5"/>
</Canvas>
